Whose Line Is It Anyway, Sci Fi Version

I enjoyed watching the television show, Whose Line Is It Anyway?, for many years because it was clever, silly, and just plain fun. They did all sorts of skits and all of them mostly ad lib. I found a very silly video in which they make up songs that have to do with science fiction. I wish there were still shows like this one today because it did not require super special technical effects, a lot of money, but it did require a lot of brain power and a great sense of humor.
Enjoy the clip.